Cable modem



FIG. 1 is a perspective view, showing our new design for a cable modem;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right elevation view thereof (the left elevation viewthereof being symmetrical thereto);

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The new and ornamental design for a cable modem, as shown and described. 